Table 1 Characteristics of the systematic reviews included in each overview
Overview topic and SR category | Number of included SRs | Years of publication of SRs, median (range)a | AMSTAR score, mean (standard deviation) | Total number of included primary studies | Unique primary studies, n and % included in at least one SRb | Primary study overlap between SRs (“CCA”)c |
|---|---|---|---|---|---|---|
Overviews for which Cochrane SRs examined all relevant intervention comparisons | ||||||
Bronchiolitis | 7 | 2009 (1996–2010) | 8.1 (3.0) | 55 | 29 | High (14.9) |
Cochrane | 4 | 2010 (2009–2010) | 10.5 (0.6) | 33 | 26 (90%) | |
Non-Cochrane | 3 | 1997 (1996–2004) | 5.0 (1.0) | 22 | 13 (45%) | |
Croup | 6 | 2008 (1989–2010) | 8.3 (3.0) | 69 | 53 | Moderate (6.0) |
Cochrane | 4 | 2010 (2006–2010) | 9.5 (1.9) | 51 | 50 (94%) | |
Non-Cochrane | 2 | 1995 (1989–2000) | 6.0 (4.2) | 18 | 18 (34%) | |
Gastroenteritis | 15 | 2007 (2001–2012) | 7.7 (1.8) | 228 | 114 | High (13.3) |
Cochrane | 3 | 2010 (2006–2010) | 10.7 (0.6) | 88 | 88 (77%) | |
Non-Cochrane | 12 | 2007 (2001–2012) | 6.9 (1.1) | 140 | 82 (72%) | |
Overviews for which Cochrane SRs did not examine all relevant intervention comparisons | ||||||
Acute asthma | 13 | 2011 (1997–2013) | 7.8 (2.0) | 82 | 56 | Slight (3.9) |
Cochrane | 7 | 2011 (2002–2013) | 8.4 (1.8) | 48 | 45 (80%) | |
Non-Cochrane | 6 | 2006 (1997–2013) | 7.0 (2.0) | 34 | 34 (61%) | |
Acute otitis media | 15 | 2009 (1994–2011) | 8.1 (2.6) | 260 | 135 | Moderate (6.6) |
Cochrane | 6 | 2009 (2007–2011) | 10.2 (0.8) | 87 | 84 (62%) | |
Non-Cochrane | 9 | 2006 (1994–2010) | 6.7 (2.5) | 173 | 107 (79%) | |
Eczema | 19 | 2007 (2003–2011) | 6.6 (2.9) | 198 | 136 | Slight (2.5) |
Cochrane | 6 | 2007 (2006–2011) | 9.3 (1.8) | 29 | 29 (21%) | |
Non-Cochrane | 13 | 2008 (2003–2010) | 5.4 (2.4) | 169 | 130 (96%) | |
Procedural sedation | 13 | 2009 (2004–2013) | 3.7 (1.8) | 180 | 85 | Moderate (9.3) |
Cochrane | 0 | NA | NA | NA | NA | |
Non-Cochrane | 13 | 2009 (2004–2013) | 3.7 (1.8) | 180 | 85 (100%) | |
All overviews | ||||||
Total | 88 | 2008 (1989–2013) | 7.0 (2.8) | 1072 | 608 | NA |
Cochrane | 30 | 2010 (2002–2013) | 9.6 (1.6) | 336 | 322 (53%) | |
Non-Cochrane | 58 | 2007 (1989–2013) | 5.7 (2.3) | 736 | 469 (77%) | |